HPS conversion is an MH light bulb usable through an equal watt HPS ballast MH conversion is an HPS light bulb usable through an equal watt MH ballast
i was wondering the same thing...so because ive got a 150w hps which doesnt say anything about MH on it can infact just buy a 150w MH bulb and plug it straight in and it will work? cheers ( sorry to hijack the thread)
i just mean whats the difference for when to use them? like does it matter or are you supposed to use one during vegging and one during flowering or something?
You can grow with either MH or HPS the whole entire grow if you wanted to MH has a blue/white spectrum geared more for veg state if thats what you mean HPS has a red/orange spectrum geared more for Flowering/blossoming But you can grow from beginning to end with either one like is said earlier It is better if you can have the best of both worlds during the grow One or the other is good The sun is the best ofcourse GL